Cylindrical pin wrench



FIG. 1 is a side elevational view of a cylindrical pin wrench showing my new design, the associated electric contact pin and elbow connector being shown in broken lines for illustrative purposes only;

FIG. 2 is a perspective view of the cylindrical pin wrench on an enlarged scale;

FIG. 3 is an end view thereof;

FIG. 4 is a side elevational view thereof;

FIG. 5 is a top plan view thereof. 

The ornamental design for a cylindrical pin wrench, as shown and described. 